Samsung A12 Hard reset/Pattern unlock
Hard reset no working with locked google account (make sure you know your password before reseting).
1.) Unlock display,make some pattern
2.) Try to OFF
3.) Make pattern again then push back
4.) Try to RESTART then push back
5.) Hold Volume down+on/off
6.) At black screen switch to Volume up and still hold on/off
7.) Wipe data / Reboot system